JP4042990B2 - Integrated plate heat exchanger having a function of separating condensed fluid and method for manufacturing the same - Google Patents

Description

  The present invention relates to a plate-type heat exchanger having a condensed fluid separation function and a method for manufacturing the same, and more specifically, a refrigeration type air dryer product having a cooling function and a condensed fluid separation function, which can be reduced in size and weight. The present invention relates to a body-type plate heat exchanger and a method capable of easily manufacturing the same.

The plate heat exchanger is used to convert high-temperature compressed air into low-temperature compressed air, and is used for components of air dryers (air dryers). Such an air dryer is a device that converts high-temperature and high-humidity saturated compressed air into compressed air in a low-temperature dry state so that it can be used in various industrial equipment, and is composed of a plate heat exchanger and a separator. Such a plate-type heat exchanger is formed by laminating a large number of irregularly shaped plates in consideration of the type of fluid, flow path, strength, etc., and high-temperature and high-humidity compressed air of the heating fluid (high temperature side) between the layers, This is a device for alternately flowing a refrigerant or the like which is a fluid (low temperature side) to exchange heat. Interlayer channel between the plates are cut off from the atmosphere and an adjacent channel, a structure in which different two kinds of fluids to flow in counter flow are separated by a plate, cross layer by layer is high and low temperature fluid While heat exchange occurs. Such a plate heat exchanger is partitioned into a reheater and a chiller by a partition, and a separator connected to the chiller and the reheater through a pipe line is installed outside the plate heat exchanger. Configured. Here, the separator is a device for separating the condensed fluid condensed through heat exchange in the chiller from the low-temperature dry compressed air and then sending only the low-temperature dry compressed air to the reheater. Accordingly, the hot and humid saturated compressed air compressed by the compressor flows into the inflow hole of the plate heat exchanger, and is firstly heat-exchanged with the low-temperature dry compressed air by the reheater and cooled to the chiller. It is transferred to the secondary heat exchange with the refrigerant, flows into the separator and separated into moisture and low-temperature dry compressed air, and the low-temperature dry compressed air enters the reheater again to exchange the heat with the hot and humid compressed air. After being discharged. Since such a conventional plate heat exchanger itself has a structure in which the condensed fluid cannot be separated, a separate separator is installed outside, and the separator is connected to the chiller and reheater of the plate heat exchanger by external piping. Had a structure.

  An object of the present invention is to prevent heat transfer loss in such a plate heat exchanger, to reduce the installation space of the connecting pipe line, and to greatly reduce the manufacturing cost.

In order to achieve such an object, the present invention is to separate moisture from high-temperature and high-humidity air into a chiller so that the internal structure of a plate heat exchanger has the function of a separator, and to produce low-temperature dry compressed air. An adiabatic expansion chamber is formed, and a condensation net is installed inside the reheater to re-extract moisture remaining in the low-temperature dry compressed air, thereby reducing the size and weight of the plate heat exchanger and reducing heat loss. An integrated plate heat exchanger having a function of separating condensed fluid and a method for easily manufacturing the same are provided.
In one aspect of the invention,
Reheater (4) having a plurality of wrinkled plates (1a) stacked inside and having inflow holes (2) and outflow holes (3) connected to different compressed air flow paths inside );
It has a large number of wrinkled plates (1b) stacked inside, and has a refrigerant inlet (5) and a refrigerant outlet (6) connected to the refrigerant flow path inside, and a compressed air flow inside A chiller (7) having a passage; and a wall body for partitioning the reheater (4) and the chiller (7) and providing a conduit for compressed air to pass through the reheater (4) and the chiller (7). In a plate heat exchanger (100) consisting of a tube (10);
An adiabatic expansion chamber (8) is formed in the lower part of the chiller (7) on the pipe line where the compressed air cooled by the upper chiller (7) goes to the reheater (4);
A condensing chamber (18) is formed in the lower part of the reheater (4) connected to the adiabatic expansion chamber (8); a condensing net (9) and a drain hole (17) are installed in the condensing chamber (18). An integral plate heat exchanger having a condensed fluid separation function is provided.
In another aspect of the present invention,
Configuring the reheater to form a condensing chamber and a conduit by laminating and brazing a number of holes forming a condensing chamber and a plate having a hole forming a conduit; and By stacking and brazing a number of plates in which holes forming the adiabatic expansion chamber, holes forming the conduit, and holes forming the refrigerant inflow conduit and the refrigerant outlet conduit are laminated, the adiabatic expansion chamber and the conduit A method of manufacturing an integrated plate heat exchanger having a condensed fluid-separating function is provided, including a step of configuring a chiller so that a refrigerant inflow line and a refrigerant outlet line are formed.
(Embodiment of the Invention)

Hereinafter, the configuration of the present invention will be described in detail with reference to embodiments of the accompanying drawings.
FIG. 1 is an overall exploded perspective view of the present invention, FIG. 2 is a sectional view of the present invention, and FIG. 3 is a flow state diagram of compressed air and refrigerant according to the present invention.
As shown in FIGS. 1 and 2, an integrated plate heat exchanger having a condensing fluid separation function according to the present invention is a plate heat exchanger (100) composed of a reheater (4) and a chiller (7). In the lower part of the chiller (7) on the pipe where the air cooled from the chiller (7) goes to the reheater (4), a number of air flow paths formed inside the chiller (7) are joined together. An adiabatic expansion chamber (8) is formed; and a condensing chamber (18) in which a condensing net (9) is installed below the reheater (4) connected to the adiabatic expansion chamber (8) is provided. There is.
Here, in the reheater (4), a large number of wrinkled plates (1a) are laminated, and two laminated air passages are formed by the laminated plates (1a). The reheater (4) is formed so as to be connected to the outflow hole (3); the chiller (7) is laminated with a plurality of ridged plates (1b) to form two internal flow paths. The refrigerant inlet (5) and the refrigerant outlet (6) connected to the flow path through which the refrigerant flows are formed in the flow path, and the chiller (7) is formed so that the air flows in the other one flow path. Has been.
Each plate (1a) which forms a reheater (4) by being stacked in layers is provided with holes for forming a condensing chamber (18) and ducts (14a, 14b, 14e). Further, each plate (1b) constituting the chiller (7) is also provided with a hole forming a heat insulating expansion chamber (8) and a pipe line (14c), a refrigerant inflow pipe line (15), and a refrigerant outlet pipe line (16). Are formed in each hole.
A wall tube (10) is provided between the reheater (4) and the chiller (7). The wall tube (10) has a reheater facing hole (11) through which compressed air that has passed through the reheater (4) flows and a chiller facing hole (12) through which the compressed air is sent to the chiller (7). The communication hole (13) for connecting the chiller (7) and the reheater (4) has a structure penetrating the lower part.
In addition, an inflow hole (2) through which hot and humid compressed air flows is formed in the upper part of the reheater (4), and a plurality of pipes (14a) communicating with the inflow hole (2) are stacked. A pipe that penetrates the plate (1a) and communicates with the flow path between the layers; a pipe that connects the pipe (14a) and the compressed air flow path that communicates with the pipe (14a) at the bottom of the reheater (4). (14b) is formed so as to be connected to the reheater facing hole (11) of the wall body pipe (10); a pipe line (14d) for connecting the compressed air flow paths circulated through the chiller (7) into one wall It is formed so as to communicate with the lower communication hole (13) of the body tube (10). The conduit (14d) is formed with a condensing chamber (18) in which a condensing net (9) is installed. This is an internal channel communicating with the outflow hole (3) of the reheater (4). The drainage hole (17) is piped out on one side of the condensing chamber (18).
Further, a pipe line (14c) connected to the chiller facing hole (12) of the wall body pipe (10) and communicating with the interlayer flow path of the chiller (7) is formed on the chiller (7); In the lower part, an adiabatic expansion chamber (8) is formed which communicates with the pipe (14c) and the internal channel and communicates with the communication hole (13) of the wall pipe (10) and the pipe (14d) of the reheater (4). A refrigerant inlet (5) through which refrigerant flows and a refrigerant inflow conduit (15) communicating with the refrigerant inlet (5) are formed, and the refrigerant inflow conduit (15) communicates with the internal flow path. And a refrigerant outlet pipe (16) communicated with the refrigerant outlet (6). (See FIGS. 1 and 2)
FIG. 3 shows the flow state of compressed air and refrigerant according to the present invention; the flow of the refrigerant indicated by the dotted line and the hot and humid air indicated by the thick solid line passing through the reheater (4) while passing through the chiller (7). The flow of turning to dry air and circulating again to the Lechter (4) is shown.
In the integrated plate heat exchanger (100) having such a configuration, the hot and humid compressed air flows into the reheater (4) from the inflow hole (2) and is connected to the inflow hole (2). It flows into the inside of the reheater (4) through (14a) and flows into a number of flow paths formed inside the reheater (4).
The flow path formed inside the reheater (4) is classified into two parts; one is a flow path through which high-temperature and high-humidity compressed air flowing into the inflow hole (2) flows; One is a flow path connected to the outflow hole (3) through a flow path through which the low-temperature dry compressed air that has passed through the chiller (7) flows. Therefore, a large number of plates (1a) are laminated on the reheater (4) to form two flow paths. However, they are phase-separated and the fluids flowing through them are not mixed and only heat exchange is performed.
Accordingly, the hot and humid compressed air that has flowed in through the inflow hole (2) and the pipe line (14a) gathers in the pipe line (14b) through the internal flow path, and the reheater facing hole (11 in the wall body pipe (10)). ) Through the inside of the wall pipe (10), and then flows into the pipe (14c) of the chiller (7) through the chiller facing hole (12), primary heat exchange is performed.
The hot and humid compressed air in the pipe (14c) formed in the upper part of the chiller (7) passes through the flow path formed in the chiller (7), passes through the lower adiabatic expansion chamber (8), and passes through the chiller ( 7) Secondary heat exchange is performed with the refrigerant passing through the other flow paths inside. The refrigerant enters the lower refrigerant inlet (5), passes through the refrigerant inflow pipe (15) and a large number of chillers (7) connected to the refrigerant inlet pipe (15), and passes through the upper refrigerant outlet pipe (16) and the refrigerant outlet. (6) comes out through.
Of course, the compressed air and refrigerant flowing inside the chiller (7) are partitioned into a large number of stacked plates (1b) and flow alternately, so that only full-scale secondary heat exchange is performed without mixing. It becomes like this.
As described above, while passing through the chiller (7), the hot and humid compressed air is separated from the moisture and changed to low-temperature dry compressed air. At this time, the separated water falls down and is drained through a drain hole (17) formed below the condensing chamber (18).
In addition, the present invention brings about the separation effect of water by adiabatic expansion together with the separation of water by the above secondary heat exchange; for this purpose, the adiabatic expansion chamber (8) constitutes a chiller (7) in the present invention. It is formed at the lower end of a large number of plates (1b). When compressed air flows into the wide adiabatic expansion chamber (8) from the narrow flow path into the chiller (7), it is insulated by the pressure drop. It is expanded, and at this time, due to the consumption of internal energy, the temperature is lowered, and excess water contained in the air is condensed and separated.
The air from which moisture has been removed again by the adiabatic expansion flows into the lower pipe (14d) of the reheater (4) through the lower communication hole (13) of the wall pipe (10). A condensing chamber (18) is formed in the conduit (14d) of the reheater (4); here, a condensing net (9) is installed. The condensing net (9) is made of a dense net or a mesh-shaped net and has a structure in which moisture remaining in the low-temperature dry air is finally condensed and extracted. That is, the air from which most of the water has been removed in the adiabatic expansion chamber (8) is adhered and condensed and separated while remaining in contact with the condensation network (9).
Thus, the water | moisture content isolate | separated by the condensation net | network body (9) of an adiabatic expansion chamber (8) and a condensation chamber (18) is discharged | emitted outside through a drainage hole (17).
The air that has passed through the condensing net (9) is discharged through the upper pipe (14e) and the outflow hole (3) while flowing upward through the internal flow path of the reheater (4). At this time, the air flowing through the internal flow path of the Lechter (4) flows in through the inflow hole (2) and the pipe line (14a), and exchanges heat and humid with the hot and humid compressed air flowing through another internal flow path. Will come to be.
The plate heat exchanger of the present invention having the above-described configuration and operation is easily manufactured as a single piece by laminating and brazing the plates (1a, 1b). The manufacturing method will be described. A plate (1a) is formed by forming holes for forming a condensing chamber (18) and holes for forming conduits (14a, 14b, 14e) in a plate having a fixed shape. Forming a hole for forming the adiabatic expansion chamber (8), a hole for forming the pipe (14c), a hole for forming the refrigerant inflow pipe (15) and the refrigerant outlet pipe (16) in the plate body, The step of constructing the plate (1b): the reheater (4) is arranged so that the condensing chamber (18) and the pipes (14a, 14b, 14e) are formed by laminating a plurality of plates (1a) and brazing. Stage of construction: Adiabatic expansion chamber (8), pipe (14c), refrigerant inlet pipe (15) and refrigerant outlet pipe (16) are formed by laminating a large number of plates (1b). A chiller (7) is constructed; a wall tube (10) is attached between the reheater (4) and the chiller (7), provided that the reheat The counter-facing hole (11) communicates with the pipe line (14b) of the reheater (4) and the through-chiller counter hole (12) communicates with the pipe line (14c) of the chiller (7), and the communication hole (13) communicates with the chiller (7 ) In such a way that it is communicated with the adiabatic expansion chamber (8) of the reheater (4) and the condensing chamber (18) of the reheater (4); a step of inserting the condensation network (9) into the condensing chamber (18); and the reheater (4) And a step including closing the outermost contour of the chiller (7).
As described above, the manufacturing method of the present invention makes it easy to form the bottom condensation chamber (18) and the adiabatic expansion chamber (8) by simply laminating and brazing the plates (1a, 1b) in which holes for forming pipes and the like are formed. The manufacturing method is characterized in that it is integrally formed. That is, as described above, the adiabatic expansion chamber (8) and the condensation net (9) are formed inside the plate heat exchanger (100), and exhibit the function of separating moisture together with the separator; This is because when the plates (1a, 1b) are stacked and the reheater (4) and the chiller (7) are formed, the condensation chamber (18) in which the adiabatic expansion chamber (8) and the condensation net (9) are installed naturally. It is formed.
In this way, the heat exchanger (100) that achieves the object of the present invention can be easily manufactured by holes and pipe lines (stacked to form a condensing chamber (18) in the plate (1a) constituting the reheater (4)). 14a, 14b, 14e) are formed, a plate (1b) constituting the chiller (7) is formed with a hole for forming an adiabatic expansion chamber (8), a hole for forming a conduit (14c), a refrigerant This is possible by forming holes that form the inlet line (15) and the refrigerant outlet line (16).

  As described above, the present invention forms the adiabatic expansion chamber (8) in the lower part of the chiller (7) and removes the condensation net (9) in the lower part of the reheater (4) in order to remove moisture from the hot and humid compressed air. By installing the separator, the separator that has been connected and connected to the outside by the pipe line is integrated into the inside of the plate type heat exchanger, so that the separator can be replaced with the reheater (4). The heat transfer loss due to the flow path such as piping for connecting to the chiller (7) can be minimized, the condensate discharge efficiency can be maximized, and the refrigeration air dryer product is small and lightweight. In addition to using various accessories such as separators and pipes, the manufacturing efficiency can be increased and the cost can be reduced.

Whole exploded perspective view of the present invention Cross section of the present invention Fluid flow diagram according to the present invention

Explanation of symbols

1a, 1b: Plate 2: Inflow hole 3: Outflow hole 4: Reheater 5: Refrigerant inlet 6: Refrigerant outlet 7: Chiller 8: Adiabatic expansion chamber 9: Condensation network 10: Wall body tube 11: Reheater facing hole 12: Chiller Facing hole 13: Communication holes 14a, 14b, 14c, 14d, 14e: Pipe line 15: Refrigerant inlet line 16: Refrigerant outlet line 17: Drain hole 18: Condensing chamber 100: Plate type heat exchanger

Claims (9)

Reheater (4) having a large number of wrinkled plates (1a) stacked inside and having an inflow hole (2) and an outflow hole (3) connected to different compressed air flow paths inside );
It has a large number of wrinkled plates (1b) stacked inside, and has a refrigerant inlet (5) and a refrigerant outlet (6) connected to the refrigerant flow path inside, and a compressed air flow inside A wall having a passage, partitioning the reheater (4) and the chiller (7) and providing a conduit for compressed air to pass through the reheater (4) and the chiller (7) In a plate heat exchanger (100) consisting of a tube (10);
An adiabatic expansion chamber (8) is formed in the lower part of the chiller (7) on the pipeline where the compressed air cooled by the chiller (7) goes to the reheater (4);
A condensing chamber (18) is formed in the lower part of the reheater (4) connected to the adiabatic expansion chamber (8); a condensing net (9) and a drain hole (17) are installed in the condensing chamber (18). An integrated plate heat exchanger having a condensed fluid separation function. The integrated plate heat exchanger according to claim 1, wherein the plate (1a) is formed with holes for forming a condensing chamber (18) and holes for forming pipes (14a, 14b and 14e). The plate (1b) is formed with a hole for forming the adiabatic expansion chamber (8), a hole for forming the conduit (14c), and a hole for forming the refrigerant inflow conduit (15) and the refrigerant outlet conduit (16). The integrated plate type heat exchanger according to claim 1 or 2, wherein:   The wall tube (10) is formed with a reheater facing hole (11) through which compressed air flows from the reheater (4) and a chiller facing hole (12) through which compressed air is sent to the chiller (7). The integrated plate heat exchanger according to claim 1, 2 or 3, wherein a communication hole (13) for connecting the chiller (7) and the reheater (4) is formed in the lower part.   The integrated plate according to any one of claims 1 to 4, wherein a plurality of compressed air flow paths formed inside the chiller (7) are joined together to form an adiabatic expansion chamber (8). Mold heat exchanger. An inflow hole (2) is formed in the upper part of the reheater (4), and a pipe line (14a) communicating with the inflow hole (2) passes through the plate (1a) and communicates with a flow path between layers. A conduit (14b) communicating with the conduit (14a) is formed at the lower portion of the reheater (4) so as to be connected to the reheater facing hole (11) of the wall tube (10). The integrated plate type heat according to any one of claims 1 to 5, wherein the pipe line (14d) provided with 9) is formed so as to communicate with the lower communication hole (13) of the wall body pipe (10). switch.   A pipe line (14c) is formed on the top of the chiller (7) so as to be connected to the chiller facing hole (12) of the wall tube (10) so as to communicate with the interlayer flow path of the chiller (7). A heat insulating expansion chamber (8) communicating with the pipe (14) of the wall body pipe ((10)) and the pipe (14d) of the reheater (4) is formed in the lower part and communicated with the pipe (14c) and the internal flow path. The refrigerant inlet (5) into which the refrigerant flows and the refrigerant inlet pipe (15) communicating with the refrigerant inlet (5) are formed, and the refrigerant inlet pipe (15) is communicated with the internal flow path to form the refrigerant outlet ( The integrated plate heat exchanger according to any one of claims 1 to 6, which is connected to a refrigerant outlet pipe (16) communicating with 6).   The integrated plate-type heat according to any one of claims 1 to 7, wherein the condensing chamber (18) is formed by joining the internal flow path communicating with the outflow hole (3) of the reheater (4). switch. By laminating and brazing a number of plates (1a) in which holes for forming the condensation chamber (18) and holes for forming the conduits (14a, 14b and 14e) are formed, the condensation chamber (18) and the conduit ( 14a, 14b and 14e) are formed so as to form a reheater (4); and a hole forming the adiabatic expansion chamber (8) and a pipe forming a pipe (14c) and a refrigerant inflow pipe (15 ) And a plurality of plates (1b) in which holes forming the refrigerant outlet pipe (16) are laminated and brazed, so that the adiabatic expansion chamber (8), the pipe (14c), the refrigerant inflow pipe ( 15) and the manufacturing method of the integrated plate type heat exchanger which has a condensed fluid separation function characterized by including the step which comprises a chiller (7) so that a refrigerant | coolant exit line (16) may be formed.

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